Docosahexaenoic acid (DHA): In humans, this omega-3 fatty acid is a key part of sperm, the retina, a part of the eye, and the cerebral cortex, a part of the brain.

DHA is present throughout the body, especially in the brain, the eyes and the heart. It is also present in breast milk.

Health benefits

Some studies have concluded that fish oil and omega-3 fatty acid is beneficial for health, but others have not. It has been linked to a number of conditions.

Multiple sclerosis

Fish oils are said to help people with multiple sclerosis (MS) due to its protective effects on the brain and the nervous system. However, at least one study concluded that they have no benefit.

Prostate cancer

One study found that fish oils, alongside a low-fat diet, may reduce the risk of developing prostate cancer. However, another study linked higher omega-3 levels to a higher risk of aggressive prostate cancer.

Research published in the Journal of the National Cancer Institute suggested that a high fish oil intake raises the risk of high-grade prostate cancer by 71 percent, and all prostate cancers by 43 percent.

Post-partum depression

Consuming fish oils during pregnancy may reduce the risk of post-partum depression. Researchers advise that eating fish with a high level of omega 3 two or three times a week may be beneficial. Food sources are recommended, rather than supplements, as they also provide protein and minerals.

Mental health benefits

An 8-week pilot study carried out in 2007 suggested that fish oils may help young people with behavioral problems, especially those with attention deficit hyperactivity disorder (ADHD).

The study demonstrated that children who consumed between 8 and 16 grams (g) of EPA and DHA per day, showed significant improvements in their behavior, as rated by their parents and the psychiatrist working with them.

Memory benefits

Omega-3 fatty acid intake can help improve working memory in healthy young adults, according to research reported in the journal PLoS One.

However, another study indicated that high levels of omega-3 do not prevent cognitive decline in older women.

Heart and cardiovascular benefits

Omega-3 fatty acids found in fish oils may protect the heart during times of mental stress.

Findings published in the American Journal of Physiology suggested that people who took fish oil supplements for longer than 1 month had better cardiovascular function during mentally stressful tests.

In 2012, researchers noted that fish oil, through its anti-inflammatory properties, appears to help stabilize atherosclerotic lesions.

Meanwhile, a review of 20 studies involving almost 70,000 people, found "no compelling evidence" linking fish oil supplements to a lower risk of heart attack, stroke, or early death.

People with stents in their heart who took two blood-thinning drugs as well as omega-3 fatty acids were found in one study to have a lower risk of heart attack compared with those not taking fish oils.

The AHA recommend eating fish, and especially oily fish, at least twice a week, to reduce the risk of cardiovascular disease.

Alzheimer's disease

For many years, it was thought that regular fish oil consumption may help prevent Alzheimer's disease.
However, a major study in 2010 found that fish oils were no better than a placebo at preventing Alzheimer's.

Meanwhile, a study published in Neurology in 2007 reported that a diet high in fish, omega-3 oils, fruit, and vegetables reduced the risk of dementia and Alzheimer's.

Vision loss

Epilepsy

A 2014 study published in the Journal of Neurology, Neurosurgery & Psychiatryclaims that people with epilepsy could have fewer seizures if they consumed low doses of omega-3 fish oil every day.

Schizophrenia and psychotic disorders

Omega-3 fatty acids found in fish oil may help reduce the risk of psychosis.

Findings published in Nature Communications details how a 12-week intervention with omega-3 supplements substantially reduced the long-term risk of developing psychotic disorders.

Health fetal development

Omega-3 consumption may help boost fetal cognitive and motor development. In 2008, scientists found that omega-3 consumption during the last 3 months of pregnancy may improve sensory, cognitive, and motor development in the fetus.

Foods

The fillets of oily fish contain up to 30 percent oil, but this figure varies. White fish, such as cod, contains high concentrations of oil in the liver but less oil overall. Oily fish that are rich in omega-3 fatty acids include anchovies, herring, sardines, salmon, trout, and mackerel.

Other animal sources of omega-3 fatty acids are eggs, especially those with "high in omega-3" written on the shell.

Vegetable-based alternatives to fish oil for omega 3 include:

Fish is not the only food source of omega-3 oils.

flax

hempseed

perilla oil

spirulina

walnuts

chia seeds

radish seeds, sprouted raw

fresh basil

leafy dark green vegetables, such as spinach

dried tarragon

A person who consumes a healthful, balanced diet should not need to use supplements.

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Comments(13)

I read your article and get nice information regarding to Omega 3 fish oil. after reading your article i get how important the fish oil and omege 3 fatty acids.These types of supplements are really make our health more justified and successful by giving effective result.

I had been using Omega 3 supplements as an alternative anti inflammatory for arthritis. My wife have these supplement to lower down here cholesterol level and excess fat. When i read the label sure enough the mg content of the essential fatty acids match what was recommended by my doc, been taking these fish oil supplement since. I guess there is a truth to the benefits of omega 3 on our overall well being.

Have taken a serious look at the study that "suggests" a link between prostate cancer and fish oil consumption? There is absolutely no evidence. Men were given ONE blood test at the start of the study to determine different blood parameters including omega 3 levels. They were Never checked again. Omega 3 levels on one day in your life cannot determine your prostate caner risk. That is absurd and bad science.

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